Microlens Mass Measurement using Triple-Peak Events
نویسنده
چکیده
We show that binary microlensing events with three well-measured peaks (two caustic crossings plus a cusp approach) can yield determinations of both the projected Einstein radius r̃E and the angular Einstein radius θE, and so the lens mass M = c2(4G)−1r̃EθE. To a certain extent, rotation of the binary can mimic the effects of parallax, but should often be possible to disentangle parallax from rotation by making use of the late-time light curve. Subject headings: gravitational lensing
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